Lepton is a tool and file format for losslessly compressing JPEGs by an average of 22%.
翻译 - Lepton是一种工具和文件格式，可平均无损压缩JPEG 22％。
Free Lossless Image Format
翻译 - 免费无损图像格式
JPEG XL image format reference implementation
CD image processing suite with optimized lossless encoders in C#
Fast In-Memory Data Compression Algorithm (inline C/C++) 460+MB/s compress, 2800+MB/s decompress, ratio% better than LZ4, Snappy, and Zstd@-1
CharLS, a C++ JPEG-LS library implementation
🧙♂️ From developers to developers: a cross-platform tool for losslessly image compression.
Data Compression using Arithmetic Encoding in Python
JavaScript FLAC encoder, decoder
An online .txt file compressor, de-compressor tool which uses Huffman Coding for Lossless data compression.
An arithmetic coder for Rust.
High-speed lossless data compression of 16 to 512 bytes--get better average compression than QuickLZ for 512-byte blocks. td512 maintains good compression down to 16-byte blocks.
Java rewrite of Sela lossless audio codec
Delphi / Free Pascal Compitable JPEG-LS Codec
🔧 Arithmetic coding algorithm implemented in Node.js, both API and CLI support. 算术编码 npm 包，支持 API 调用和 CLI。
compute entropy of an image, text; encode/decode text with huffman coding, LZW, LZ77; quantizatize image, signal